The City of Lies and the City of Truth

Posted On 10. Oktober 2017

You are at an unmarked intersection … one way is the City of Lies and another way is the City of Truth.
Citizens of the City of Lies always lie. Citizens of the City of Truth always tell the truth.
A citizen of one of those cities (you don’t know which) is at the intersection. What question could you ask to them to find the way to the City of Truth?

Answer:

You can ask „where the citizen come from“ will get the same answer. No matter which city the person is from, they will point toward the City of Truth.

The citizen of the City of Truth would point to the City of Truth, because they’re truly from there. The Liar would also point to the City of Truth, because they’re lying.

Thus, it doesn’t matter which citizen you’re speaking to, you know where the City of Truth is.